772B TRACTOR 773B & 775B TRUCKS ELECTRICAL SYSTEM

©
1994 Caterpillar
All Rights Reserved
Printed in U.S.A.
Component Identifiers (CID) List
Automatic Retarder Control (ARC)
(MID No. 083)
CID No. Component
091 Accelerator Position Signal ¹
168 Electrical System Voltage
190 Engine RPM Sensor
248 CAT Data Link
627 Parking Brake Signal ¹
650 Harness Code
700 Actual Gear Signal ¹
702 Selected Gear Signal ¹
710 ARC Supply Solenoid
711 ARC Control Solenoid
712 Retarder Lamp
713 ARC On/Off Switch
714 Auto Retarder Pressure Switch
715 Retarder Pressure Switch
¹ Signal received by ARC on the CAT data link.
Component Identifiers (CID) List
Electronic ProgrammableTransmission Control ll
(EPTC ll) (MID No. 027)
CID No. Component
168 Electrical System Voltage
190 Engine RPM Sensor
248 CAT Data Link
269 Sensor Supply
627 Parking Brake Switch
650 Harness Code
672 Torque Converter Output Speed Sensor
700 Transmission Gear Switch
701 Transmission Output Speed Sensor
702 Shift Lever Switch
704 Service Brake Pressure Switch
705 Body Raise Switch
706 Body Up Switch
707 Up Solenoid
708 Down Solenoid
709 Lockup Solenoid
Component Location
Component
Schematic
Location
Machine
Location
Component
Location
Machine
Location
Alarm - Action (EMS) C-2 1 Solenoid - Engine Fan (Fan Clutch) A-5 29
Alarm - Backup B-15 2 Solenoid - Engine Shutdown A-3 30
Alarm - Engine Overspeed F-1 A Solenoid - Lockup A-13 16
Alternator A-3 3 Solenoid - Proportional A-14 25
Batteries A-7 4 Solenoid - Start Aid A-5 31
Breakers
C-5, C-6,
D-5, D-6
A Solenoid - Up Shift A-14 28
Control - Auto Retarder (ARC) C-8 5C Speedometer F-2 A
Control - Engine Shutdown C-3 6 Switch - AC Pressure (Fan Clutch) A-5 26
Control - Supplemental Steering E-1 7 Switch - Accelerator Press (ARC) C-9 32C
Control - Traction Aid (AETA) D-1 B Switch - Auto Retarder OFF/ON (ARC) D-3 A
Control - Transmission (EPTC II) D-1 B Switch - Backup Alarm D-11 33
Converter - 24V/12V C-4 8C Switch - Blower E-11 17
Distributor - Transmission Speed E-1 9C Switch - Body Raise (EPTC II) D-12 B
Dryer - Air A-8 10 Switch - Brake Master Cylinder Overstroke A-10 34
Flasher E-5 A Switch - Brake Oil Temp (EMS) A-9 19
Fuse - Supplemental Steering Lamp A-8 11 Switch - Brake Retarder Press F-15 35
Fuses D-6 A Switch - Brake System Air Press(EMS) C-15 36C
Gauge - Air Press D-3 A Switch - Converter/Retarder Temp(EMS) A-9 37
Gauge - Brake Oil Temp F-2 A Switch - Disconnect A-6 4
Gauge - Coolant Temp F-3 A Switch - EMS/AETA Test D-3 A
Ground - Cab E-12 12C Switch - Engine Coolant Flow (EMS) A-4 38
Ground - Cab/Frame C-11 13 Switch - Engine Coolant Temp (EMS) B-4 3
Ground - Frame B-9 13 Switch - Engine Coolant Temp(Start Aid) A-5 39
Indicator - Transmission Gear D-10 A Switch - Engine Oil Press (EMS) A-4 29
Lamp - Action (EMS) F-2 A Switch - Fuel Press (EMS) B-4 40
Lamp - Brake Retarder F-2 A Switch - Key Start F-3 A
Lamp - Engine Overspeed Warning F-2 A Switch - Manual Retarder Press (ARC) C-9 35
Lamp - Retarder (ARC) C-9 A Switch - Parking Brake Press (EMS) C-15 41C
Lamp - Supplemental Steering E-2 A Switch - Refrigerant Press (AC) B-7 42
Meter - Service E-13 B Switch - Retarder Press (ARC) C-9 27C
Module - Stop/Tail Lamp B-14 14 Switch - Running Lamp E-3 A
Monitor - Engine Overspeed E-1 6 Switch - Secondary Brake Press (EPTC II) E-15 41C
Monitor - Operator (EMS) D-1 A Switch - Service Brake Press (AETA) E-15 43C
Motor - Starting A-6 15 Switch - Service Brake Press (EPTC II) E-15 43C
Motor - Supplemental Steering A-7 16 Switch - Service Clear (ARC) C-8 5C
Motors - Blower E-10 17 Switch - Service Clear (EPTC II) E-13 B
Pickup - Engine Speed (Tachometer) A-5 18 Switch - Service Set (ARC) C-8 5C
Relay - Main Power D-6 6 Switch - Service Set (EPTC II) F-13 B
Relay - Starter A-6 11 Switch - Shift Lever D-11 33
Relay - Supplemental Steering Motor A-7 11 Switch - Start Aid D-3 A
Resistor - Blower Speed E-10 17 Switch - Steering Flow A-8 10
Resistor - Start/Charge DiagnosticConn A-6 15 Switch - Stop Lamp Press (Module) F-15 43C
Sender - Brake Oil Temp (Gauge) A-9 19 Switch - Supplemental Steering E-3 A
Sender - Coolant Temp (Gauge) A-4 20 Switch - Thermostat E-11 17
Sensor - Body Up (EPTC II) A-13 14 Switch - Transmission A-13 28
Sensor - Engine Coolant Temp (Fan Clutch) A-5 21 Switch - Transmission Filter Press (EMS) A-9 44
Sensor - Transmission Speed A-13 22 Switch - Transmission Oil Temp (EMS) A-9 44
Sensor - Wheel Speed (LH) B-15 23 Switch - Turn Signal D-5 A
Sensor - Wheel Speed (RH) A-15 24 Tachograph F-12 B
Solenoid - 4 Way A-14 25 Tachometer F-3 A
Solenoid - Air Conditioner Clutch B-3 26
Solenoid - ARC Control Valve C-9 27C
Solenoid - ARC Supply Valve C-9 27C
Solenoid - Down Shift A-14 28
Machine locations are repeated for components located close together.
A = Components located in dash area.
B = Components located behind operator’s seat.
C = Components located in rear compartment.
Harness Connector Location Chart
Connector
Machine
Location
Harness And/Or
Components
Schematic
Location
Connector
Machine
Location
Harness And/Or
Components
Schematic
Location
L-109-4159
Transmission Control
D-13
A - 109-4160
P-109-4196
E-9
PP-111-0715
Auto Retarder Control
C-7
A - 109-4160
Transmission SpeedDistributor
E-15
25 Contacts
A - 109-4160
H-112-2920
C-11
D - 2A-6648
P - 109-4196
C-10
A-109-4160
J-112-2921
C-12
L - 109-4159
Transmission GearIndicator
D-10
A - 109-4160
Diagnostic Connector (Starting And
Charging)
D-12
P - 109-4196
Engine Shutdown Control
C-3
L-109-4159
Y-112-2922
C-13
A - 109-4160
M - 111-0713
D-4
P- 109-4196
Operator Monitor
D-2
A - 109-4160
S - 6G-9462
D-5
R - 71-4854
Traction Aid
D-15
A-109-4160
T - 7I-5825
D-4
L-109-4159
VV - 8W-6419
D-10
E - 7I-5822
J-112-2921
B-14
R - 71-4854
V - 8X-8728
C-14
NN - 106-9506
Converter
C-4
A-109-4160
G - 109-4052
E-3
P - 109-4196
MM-111-0714
F-1
A-109-4160
G - 109-4052
E-3
A-109-4160
N - 7X-1784
E-10
A-109-4160
L-109-4159
E-14
A - 109-4160
R - 7I-4854
D-15
L-109-4159
Transmission Control
E-13
H-112-2920
Aux Start Relay
B-7
PP-111-0715
Auto Retarder Control
C-8
H - 112-2920
Coolant Temp Sensor (Fan Clutch)
A-5
VV-8W-6419
Shift Lever Switch
D-11
U - 7I-5824
TT - 7I-5823
B-1
Z-7T-3418
Transmission Switch
A-13
P-109-4196
ZZ - 8X-1482
D-9
Y-112-2922
Z-7T-3418
A-13
PP - 111-0715
RR - 109-4053
C-7
A-109-4160
G - 109-4052
F-3
T - 7I-5825
TT - 7I-5823
B-1
A-109-4160
P - 109-4196
E-8
Y-112-2922
RR - 109-4053
B-12
A - 109-4160
Q - 109-4341
E-5
E - 7I-5822
Stop/Tail Lamp Module
B-14
C -8W-8300
P - 109-4196
C-10
H-112-2920
MM - 111-0714
B-5
F - 108-4529
P - 109-4196
E-7
L - 109-4159
LL - 2A-7073
F-14
L - 109-4159
Diagnostic Connector(Transmission
Control)
E-12
L - 109-4159
Body Raise Switch
D-12
P - 109-4196
Supplemental SteeringControl
E-2
L - 109-4159
Transmission GearIndicator
D-10
A-109-4160
P-109-4196
E-8
V - 8X-87284
Way Solenoid
A-14
A - 109-416
Q - 109-4341
E-5
A - 109-4160
PP-111-0715
C-6
MM - 111-0714
Engine OverspeedMonitor
E-1
MM - 111-0714
Engine OverspeedMonitor
E-1
NN - 106-9506
Radio (Attachment)
C-3
V - 8X-8728
X - 8X-8727
A-14
Machine locations are repeated for connectors located close together.
* = Connector is located at the component.
A = Connector Is located behind the dash.
B = Connector is located behind the operator’s seat.
C = Connector is located in the rear compartment.
D = Connector located at the right side wall of the rear compartment.
7 Contacts
6 Contacts
5 Contacts
4 Contacts
37 Contacts
20 Contacts
14 Contacts
10 Contacts
9 Contacts
8 Contacts
Failure Mode Identifiers (FMI) List
FMI No.
Failure Description
0 Data valid but above normal operational range.
1 Data valid but below normal operational range.
2 Data erratic, intermittent, or incorrect.
3 Voltage above normal or shorted high.
4 Voltage below normal or shorted low.
5 Current below normal or open circuit.
6 Current above normal or grounded circuit.
7 Mechanical system not responding properly.
8 Abnormal frequency, pulse width, or period.
9 Abnormal update.
10 Abnormal rate of change.
11 Failure mode not identifiable.
12 Bad device or component.
13 Out of calibration.
Related Electrical Service Manuals
Form Number
Actual Gear Indicator SENR4252
Alternator (100-5047):
Consist No. 100-5046
Consist No. 100-5045
SENR2082
SENR4130
Automatic Electronic Traction Aid SENR2986
Automatic Retarder Control System SENR5683
Electronic Monitoring System SENR2945
Electronic Programmable Transmission Control II SENR5666
Engine Overspeed Indicator SENR4263
Starting And Charging Systems SENR2947
Starting Motor (3T-8967) SENR3860
Title
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
9G-1950 Resistor - Blower Motor Speed Overall 2.0 ± .1; Tap 1.0 ± .05
6T-2217 Resistor - Starter/Diagnostic Conn 150 ± 7.5
9G-9988 Solenoid - 4 Way 24.9
8T-8813 Solenoid - A/C Clutch 14.4 ± 0.6
9X-7876 (from 3E-8691) Solenoids - ARC Control Valve, ARC Supply Valve 29.8 ± 1.5
7X-1120 Solenoids - Down Shift, Up Shift, Lockup 33.7
101-0329 Solenoid - Engine Fan 62.0 ± 6.2
9X-1413 Solenoid - Engine Shutdown 3.70 ± .37
3T-0062 Solenoid - Proportional 16.0
7N-7259 Solenoid - Start Aid 6.0
¹ At room temperature unless otherwise noted.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
2M-9346 Stop Lamp Pressure (Module)
45 kPa MAX
(6.5 psi MAX)
5 kPa MIN
(0.5 psi MIN)
Normally Open
3E-2033
Secondary Brake Air Pressure (EPTC II)
Parking Brake Pressure (EMS)
640 kPa
(92.0 psi)
530 ± 40 kPa
(77.0 ± 6.0 psi)
Normally Open
3E-2034
Service Brake Air Pressure (AETA)
Service Brake Air Pressure (EPTC II)
80 kPa
(12.0 psi)
55 ± 20 kPa
(8.0 ± 3.0 psi)
Normally Closed
3E-2035
Brake Retarder Air Pressure
Manual Retarder Pressure (ARC)
60 kPa
(8.5 psi)
28 ± 15 kPa
(4.0 ± 2.0 psi)
Normally Open
3E-7868 Transmission Filter Bypass Pressure (EMS)
210 ± 70 kPa
(30 ± l0psi)
-
-
Normally Open
6T-7663 Engine Oil Pressure (EMS)
93 ± 20.8 kPa
(13.5 ± 3.0 psi)
68.9 ± 20.8 kPa
(10.0 ± 3.0 psi)
Normally Open
7N-7854
Brake Oil Temperature (EMS)
Converter/Retarder Temperature (EMS)
123.9 ± 2.8°C
(255 ± 9°F)
112.8°C MIN
(235°F MIN)
Normally Closed
7N-9785 Engine Coolant Temperature (EMS)
107.2 ± 2.8°C
(225 ± 5°F)
91.0°C MIN
(196°F MIN)
Normally Closed
8N-1693 Engine Coolant Temperature (Start Aid)
37.8 ± 2.8°C
(100 ± 5°F)
26.7°C MIN
(80°F MIN)
Normally Closed
8T-9792 Brake System Air Pressure (EMS)
517 ± 35 kPa
(75.0 ± 5.0 psi)
448 ± 35 kPa
(65.0 ± 5.0 psi)
1-3, Normally Closed
1-2, Normally Open
9G-3341 Transmission Oil Temperature (EMS)
51.7 ± 2.8°C
(125 ± 5°F)
43.0°C MIN
(110°F MIN)
Normally Closed
9W-0263 Retarder Pressure (ARC)
48.2 ± 13.8 kPa
(7.0 ± 2.0 psi)
24.1 kPa MIN
(3.5 psi MIN)
Normally Closed
9W-3187 Fuel Pressure (EMS)
93 ± 21 kPa
(13.5 ± 3.0 psi)
69 ± 21 kPa
(10.0 ± 3.0 psi)
Normally Closed
9X-3040 Engine Coolant Flow (EMS)
362 ± 29 mN (45.6 mm ID point)
(1.3 ± .1 oz, 1.8 in ID point)
303 mN MIN
(1.1 oz MIN)
Normally Open
101-0912 AC Pressure (Fan Clutch)
1600 ± 135 kPa
(230 ± 20 psi)
1275 ± 100 kPa
(185 ± 15 psi)
Normally Open
107-0615 Accelerator Pressure (ARC)
48 ± 14 kPa
(7.0 ± 2.0 psi)
24 kPa MIN
(3.5 psi MIN)
Normally Closed
109-4215 Steering Flow
4 grams
(.14 oz)
1.5 grams
(.05 oz)
Normally Open
114-5334 Refrigerant Pressure (AC)
275 to 1750 kPa ¹
(40 to 255 psi)
-
-
Normally Open ²
¹ A hysteresis band exists: with increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed
condition can be maintained down to 170 kpa (25psi).
² Contact postion at the contacts of the harness connector.
A
4
7
9
11
12
14
15
16
3
4
6
10
11
14
15
13
16
B
C
D
1
2
17
18
19
20
21
22
23
24
25
26
28
29
30
31
37
35
33
34
38
7
39
40
42
44
18
19
20
21
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Machine Harness Connector and Component Locations
Rear Compartment
Right
Side
Wall
Of Rear
Compartment
A
3
4
6
9
10
11
14
15
13
16
B
1
2
17
18
19
20
21
22
23
24
25
26
28
29
30
31
37
35
33
34
38
7
39
40
12
42
44
32
41
36
43
5
8
27
D00574
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
Normally open switch that is closed due to an applied condition, and will open again with a
specific decrease in that condition.
Normally closed switch that will open with an increase of a specific condition.
Normally closed switch that is open due to an applied condition, and will close again
with a specific decrease in that condition.
The circle indicates that the component has screw terminals and a wire can be disconnected
from it.
No circle indicates that the wire cannot be disconnected from the component.
This indicates that the component has a wire connected to it that is connected to ground.
This indicates that the component does not have a wire connected to ground. It is grounded
by being fastened to the machine.
Electrical Schematic Symbols And Definitions
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
A AA
2
A AA
1
2
325-PK-14
C
A
325-PK-14
200-BK-14
T
FUSE - A component in an electrical circuit that will open the circuit if too much current flows
through it.
REED SWITCH - A switch whose contacts are controlled by a magnet. A magnet closes the
contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.
SENDER - A component that is used with a temperature or pressure gauge. The sender
measures the temperature or pressure. Its resistance changes to give an indication to the
gauge of the temperature or pressure.
RELAY (Magnetic Switch) - A relay is an electrical component that is activated by electricity.
It has a coil that makes an electromagnet when current flows through it. The electromagnet
can open or close the switch part of the relay.
CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too
much current flows through it. This does not destroy the circuit breaker and it can be reset to
become part of the circuit again.
SOLENOID - A solenoid is an electrical component that is activated by electricity. It has a coil
that makes an electromagnet when current flows through it. The electromagnet can open or
close a valve or move a piece of metal that can do work.
Harness And Wire Electrical Schematic Symbols
Socket
Pin
Pin or Socket
Number
Wire, Cable, or Harness
Assembly Identification
Single Wire
Connector
Circuit Number
Identification
Wire
Gauge
Wire
Color
Plug
Receptacle
9X-1123
Component
Part Number
Electrical Schematic Symbols And Definitions
1
1
1
2
2
Typical representation of a
Sure-Seal connector. The
plugand receptacle contain
both pins and sockets.
Typical representation of a
Deutsch connector. The
plug contains all sockets
and the receptacle contains
all pins.
MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is
activated by electricity and held latch by a permanent magnet. It has two coils (latch and unlatch)
that make electromagnet when current flows through them. It also has an internal switch that places
the latch coil circuit open at the time the coil latches.
1
2
3
4
5
6
7
8
9
8
10
11
12
20
9
21
22
16
10
17
18
19
13
10
9
13
14
15
8
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
B
A
A
A
A
A
B
A
A
A
A
C
C
C
C
C
C
C
C
C
C
C
D
D
D
D
SENR6844
March 1994
772B Tractor
Electrical System
772B:
64W300-UP
773B:
63W4200-UP
775B:
7XJ200-UP
773B & 775B Trucks
T
T
T
4
L41
111215
15
14 13 12 11
4
2
3
1
5
1
5
4
2
1
2
8
7
6
5
4
3
10
9
3
5
2
1
7
8
4
1
6
1
2
1
3
2
1
2
1
2
2
1
3
8
7
6
5
4
3
2
1
2
8
5
4
6
5
4
1
3
10
9
4
2
3
1
2
1
2
1
6
3
1
7
7
6
6
5
4
2
4
3
3
1
C
B
A
1
2
2
2
2
1
2
10
9
8
7
6
5
4
3
2
1
2
1
F
E
D
10
C
B
A
10
2
1
1
1
5
8
7
5
6
2
1
1
4
2
3
1
2
1
1
2
2
1
2
1
3
4
3
1
2
8
7
6
1
4
3
2
5
6
1
2
2
2
2
5
6
2
4
1
5
3
2
1
1
2
1
5
8
5
2
3
1
3
2
4
1
3
2
1
4
7
4
3
1
2
1
2
1
4
2
3
5
4
3
9
8 7
9
8 7
6 5
6
5
4
3 2
1
F
E
D
3 2
1
C
B
A
B-1200109-4053RR
450-YL
450-YL
450-YL
405-GY
405-GY
D985-BR
D986-PK
202-BK
892-BR
893-GN
450-YL
405-GY
122-BU
102-BU
102-BU-14
102-BU
102-BU-14
102-BU
176-OR
202-BK
202-BK
A
A
200-BK
QQ
QQ
B-300110-6391QQ
PP A
PP
PP
PP
PP
PP
PP
PP
PP
PP
PP
PP
PP
PP
M
NN
NN
NN
NN
NN
NN
NN
MM
MM
MM
MM
ATCHC-800111-0715
C-300106-9506
E-100
10A
9
111-0714
PP
NN
MM
176-OR
Q
892-BR
202-BK
A215-BK
A217-BK
A216-BK
A218-BK
ACCELERATOR
SW
107-0615
D987-GY
D988-WH
D989-BU
D992-PU
L34
D991-OR
454-GN
313-GY
314-PU
L9
202-BK
202-BK
L10
202-BK
D993-YL
L31
L35
L39
L35
L34
L31
L40
L40
L48
L48
L38
L38
L41
L41
L42
L28
L33
L34
L34
L31
L31
L29
L29 L29
L22
L22
L14
RETARDER
LAMP
107-1983
L23
L18
A
L
893-GN
L14
L3
L22
202-BK
L20
L5
L46
TO AUX
START RELAY
L45
L32
L44
L49
892-BR
L51L50
G
L33
BODY UP SW
L49
G
L43
L42
L45
L30
L44
L25
L25
L49
L1
L1
L1
L2 L2
L30
L40
E750-PU
L35
L39
L40
L39
L35
L35
L39
L40
L40
L39
L46
L47
L50
L51
L41
L43
L44
L25
L25
202-BK
H
L51
L50
200-BK
L49
L51
L50
L49
L18
L51
L50
L49
200-BK
L1
113-OR
121-YL
113-OR
L24
L24
L24
L4
L4
L1
L9
L17
L16
L10
L18
L18
L11
6
200-BK
L11
L11
L9
L16
L10
L18
L4
L6
L47
L6
L6
113-OR
L19
L42
202-BK
L24
614-PU
123-WH
314-PU
L42
200-BK
200-BK
L9
L9
L10
L11
200-BK
113-OR
00
01
02
02
01
A-7/A-6
027X-1784
113-OR
727-GN
462-YL
200-BK
202-BK
201-BK
408-WH
201-BK
201-BK-14
LEFT LAMP
A
RIGHT LAMP
202-BK
614-PU
604-OR
640-GN
A
P
D-10
A-3
A-1
A-13
B-13
B-14
D-15
A-69F-4337
8W-6419
5T-2832
5T-2831
5V-0439
9G-0549
112-2922
018W-9493
008X-8728
007I-5824
017I-5825
007I-4854
00109-4341
00
01
00
07
00
00
00109-4052
01
00109-4160
CHG
CC
CC
C
4N-6580
C
H
C
A
A
W
W
W
W
W
W
W
P
121-YL
173-YL
TURN LAMP
BREAKER
6N-8589
A
A
A
A
A
101-RD-10
J
H H J H
202-BK
450-YL
A
J
P
A
450-YL
CC
P
N
N
A
N
A
P
A
AA
619-GN-14
103-YL-14
8
102-BU-14
Q
A
Q
A
FUEL FILTER
137-OR-12
123-WH
200-BK
308-YL
313-GY
6
8
5
2
4
3
9
7
121-YL
512-GN
410-WH
124-GN-14
200-BK
727-GN
307-OR
326-PU
308-YL
511-BR
201-BK
508-PU
411-PK
509-WH
511-BR
123-WH
200-BK-14
512-GN
200-BK-14 200-BK-14
200-BK
310-PU
462-YL
103-YL-14
767-WH
700-PK
454-GN
614-PU
605-YL
606-GY
135-BU
A513-PK
449-BU
707-PU
P
202-BK
L
201-BK
794-YL
306-GN
200-BK
200-BK
A
403-GN
RH
SPEAKER
6T-7695
522-WH-14
200-BK-14
521-YL-14
124-GN-14
517-BU-14
516-GN-14
515-GY-14
MOTOR
521-YL-14
MOTOR
124-GN-14
2
200-BK
614-PU
1
1
2
327-PK-14
LH
SPEAKER
6T7695
WH/RD-14
WH/RD-14
3
BK-14
4
BK-14
5
200-BK-14
2
200-BK-14
1
515-GY-14
515-GY-14
200-BK-14
BLOWER
9G-8697
PANEL LAMP
7N-5876
THERMOSTAT
3E-5464
BLOWER SW
6P-3236
BLOWER
9G-8697
522-WH-14
614-PU
126-PK
1
2
P
7D-1513
123-WH
614-PU
3
2
1
727-GN
728-BU
138-GN
307-OR
200-BK-14
109-OR
112-PU
109-OR
101-RD
201-BK
614-PU
918-OR
918-OR
893-GN
STRAP AS. 7G-1060
173-YL
12-24V CONVERTER
3E-8645
200-BK
GROUND RADIO
+12V RADIO
135-BU
A513-PK
+12V MEMORY
+24V BATT IN
123-WH
121-YL
200-BK
GROUND
+24V SW IN
113-OR
304-WH
302-OR
203-BK
311-WH
121-YL
126-PK
132-PK
408-WH
123-WH
103-YL-14
767-WH
700-PK
454-GN
200-BK-14
2G-4177
A-7
A-7
A-7
A-7
A-7
A-6
310-PU
126-PK
E750-PU
307-OR
306-GN
202-BK
462-YL
A-15
C-5
A-1
B-1
D-5
00
00
00
522-WH-14
C-11
IGN
SEND
GND
9
201-BK
201-BK
136-GN
728-BU
326-PU
306-GN
327-PK-14
107-WH-14
A
727-GN
308-YL
403-GN
450-YL
123-WH
405-GY
308-YL
727-GN
326-PU
728-BU
449-BU
794-YL
707-PU
411-PK
450-YL
410-WH
306-GN
201-BK
113-OR
409-OR
202-BK
614-PU
123-WH
136-GN
891-BU
138-GN
614-PU
107-WH-14
123-WH
IGN
614-PU
SEND
GND
610-OR-14
611-PU-14
611-PU-14
HEAD LAMP
DIMMER SW
2H-1855
539-BU
540-WH
614-PU
619-GN-14
611-PU-14
200-BK
SIG
+ -
LAMP
8D-1429
200-BK
614-PU
LAMP
8D-1429
SPEEDOMETER
3T-3408
IGN
SEND
GND
122-BU
121-YL
126-PK
132-PK
136-GN
138-GN
107-WH-14
113-OR
105-BR
450-YL
327-PK-14
138-GN
727-GN
136-GN
113-OR
107-WH-14
521-YL-14
522-WH-14
200-BK-8
201-BK-14
521-YL-14
202-BK
707-PU
794-YL
J
449-BU
202-BK
7 472-OR
L32
CC
A-6KK
WW
CABLE AS.
W
L
C
P
D
P
D-6
BB
WIRE AS.
V
T
S
R
J
H
F
D
A
HARNESS AS.
LOCPART NO.IDENT
327-PK-14
109-OR-6
L32
UU
Z
G
E
X
U
Q
P
C
TT
L
M
2
1
3
START
AID SW
6T-6066
200-BK
M
A
103-YL-14
700-PK
L32
173-YL
12
139-OR
101-RD-6
109-OR-6
BRAKE RETRACT
202-BK
E750-PU
101-RD-6
109-OR-6
5
202-BK
202-BK
BODY
UP
SENSOR
3E-0461
3
2
1
BK-18
BU-18
RD-18
126-PK
GROUND
SOLENOID
+ BATTERY
PYLD MNTR
XMSN
SPEED
DISTRIBUTOR
3T-5438
STEERING SW
109-4215
BK-18
200-BK-8
728-BU
112-PU-12
2
1
8
7
6
5
4
3
2
1
5
4
3
2
1
412-BU
406-PU
405-GY
413-BR
403-GN
441-OR
14
446-PU
407-PK
426-BR
201-BK
201-BK
481-GN
481-GN
L21
L21
4
202-BK
311-WH
200-BK
200-BK
200-BK-14
3
BK-18
1
2122-BU
728-BU
4
200-BK
AIR DRYER
2G-2159
201-BK
426-BR
446-PU
407-PK
481-GN407-PK
BRAKE OIL
TEMP SW
7N-7854
201-BK
T
706-BR
D-5
5
112-PU-12 10A
139-OR
8
6
5
7
3
4
1
2
138-GN
123-WH
121-YL
410-WH
737-GN
736-YL
735-OR
734-WH
L34
L34
14
103-YL-14
201-BK
200-BK
OPERATOR
MONITOR
8C-3508
COOL TEMP
767-WH
216-BK
700-PK
213-BK
ID CODE 1
ID CODE 2
619-GN-14
102-BU-14
103-YL-14
614-PU
ENG OIL PR
BRAKE ON
PRIM STER
8
7
6
3
4
5
2
1
AUX START
RECEPTACLE
GROUND
+ BATTERY
11
L29
773-GY
V
R
767-WH
202-BK
767-WH
770-GN
769-BU
775-BR
774-YL
212-BK
213-BK
OR
216-BK
11
1
2
8
9
4
14
5
7
6
10
13
LAMP
610-OR-14
610-OR-14
2
FLASHER
8D-6946
767-WH
700-PK
32
AA
A-300
P
138-GN
794-YL
P
XMSN FILTER
E
891-BU
E
E
E
E
CV/RTD TEMP
22
L12
A
308-YL
310-PU
415-GN
DD
DD
D
HH
F
F
F
L11
H
BK-18
WH-18
450-YL
200-BK
ENGINE SPEED
PICKUP
3E-7886
136-GN
DD
JJ
DISCONNECT SW
7N-0718
L14
304-WH
207-BK
302-OR
306-GN
RESISTOR
6T-2217
302-OR
304-WH
Q
L
Q
SUPPLEMENTAL
STEERING
9G-9487
F
3
12
A
BK-18
ID CODE 2
ID CODE 3
D987-GY
202-BK
202-BK
ID CODE 1
GROUND
176-OR
FRONT GR 5
FRONT GR 4
F
FRONT GR 3
FRONT GR 2
FRONT GR 1
ARC
ARC SUPPLY
VALVE
3E-8691
202-BK
202-BK
737-GN
736-YL
735-OR
734-WH
733-BR
202-BK
126-PK
BR-18
202-BK
202-BK
GY-18
WH-18
TRANSMISSION
GEAR INDICATOR
8C-9609
202-BK
BK-18
+BATTERY
D989-BU
202-BK
D988-WH
PU-18
BU-18
201-BK
437-BR
412-BU
405-GY
406-PU
413-BR
403-GN
426-BR
407-PK
446-PU
D992-PU
202-BK
202-BK
D994-BU
D993-YL
SERVICE SET SW
9D-3721
SERVICE CLEAR SW
9D-3721
D991-OR
202-BK
MANUAL
RETARDER
PRESS SW
3E-2035
ARC CONTROL
VALVE
3E-8691
ALTERNATOR
EMS/AETA
TEST SW
3E-3744
BK-18
D987-GY
176-OR
892-BR
893-GN
D994-BU
D992-PU
D991-OR
454-GN
450-YL
D989-BU
D988-WH
D986-PK
D985-BR
202-BK
1
UNUSED SW
UNUSED SINKING DRIVER
UNUSED PWM, FREQ, SW
SPARE
UNUSED PWM
UNUSED PWM
GROUND
MANUAL RETARD PRESS SW
AUTO RETARD PRESS SW
SERVICE BRAKE
AUTO RETARD LAMP
OIL PRESSURE SW
AIR SUPPLY VALVE
405-GY
419-YL
123-WH
ENGINE SPEED
918-OR
AIR CONTROL VALVE
ACCELERATOR SW
450-YL
SECONDARY BRAKE SW
P
HARNESS CODE 3
HARNESS CODE 1
HARNESS CODE 2
HARNESS CODE 0
UNUSED SW TO GND
201-BK
UNUSED SW TO GND
UNUSED SW TO GND
GROUND
UNUSED SINKING DRIVER
449-BU
417-GY
UNUSED SINKING DRIVER
419-YL
201-BK
201-BK
415-GN
ENGINE
OVERSPEED
ALARM
9G-9813
437-BR
413-BR
COOL FLOW
UNUSED SINKING DRIVER
412-BU
UNUSED SINKING DRIVER
411-PK
207-BK
UNUSED SW TO GND
203-BK
410-WH
UNUSED SW TO GND
409-OR
9
UNUSED SW TO GND
408-WH
1
UNUSED SW TO GND
AUTO RETARD OFF
AUTO RETARD ON
407-PK
RD
RESUME
+10V SENSOR SUPPLY
+ BATTERY
DATA LINK -
406-PU
DATA LINK +
UNUSED
311-WH
13
302-OR
CLEAR SWITCH
405-GY
SET SWITCH
426-BR
UNUSED
403-GN
UNUSED
201-BK
200-BK-14
639-WH 3
4
2 TAIL IN
UNUSED
UNUSED
9
UNUSED
36
35
30
29
28
27
2
21
16
15
5
12
10
AUTO RETARDER
CONTROL
3E-3663
3
8
13
14
37
18
17
19
7
6
20
34
33
32
31
25
24
23
22
26
11
113-OR
WH
BK
WH
BK
(L)
S-2
(R)
S-1
2W-0104
PROPORTIONAL
SOLENOID
3T-0062
767-WH
202-BK
767-WH
202-BK
769-BU
770-GN
V
3
2
1
BK
WH
GROUND
SIGNAL
+V
C
B
A
GROUND
SIGNAL
+V
A
3
B
C
6
FUEL PR
BK AIR PR
614-PU
NEUTRAL
614-PU
1
ALARM
614-PU
PANEL
LAMP
110-2079
614-PU
PANEL
LAMP
110-2079
PANEL
LAMP
110-2079
614-PU
PANEL
LAMP
110-2079
200-BK
200-BK
VALVE GP 3E-8978
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
VALVE GP 3E-8978
200-BK
200-BK
614-PU
9
200-BK
306-GN
301-BU
SUPPLEMENTAL
STEERING MOTOR
2G-6158
BK-00
611-PU-14
1
STARTER
3T-8967
FUSE
3K-8782
10A
12V BATTERY
9G-2648 STD
12V BATTERY
9G-2648 STD
7
H
FF
L36
HH
GG
02
EE
L36
CC BB
RD-00
RD-00
T
A
304-WH-10
BK-00
STEERING
MOTOR
RELAY
3E-0154
START RELAY
3E-7279
10
462-YL
515-GY-14
BK-00
RD-00
BK-00
G S
MTR BAT
MOTOR
MOTOR
200-BK
200-BK-14
NEGPOSNEGPOS
200-BK
Q
ENGINE
OIL SW
6T-7663
L21
BK-6
AIR
CONDITIONER
CLUTCH
SOLENOID
8T-8813
ALTERNATOR
100-5047
ENGINE
SHUTDOWN
SOLENOID
9X-1413
TO
ENGINE
BLOCK
JJ
C
UU
2
1
15A
P
F
101-RD-10
2
8
614-PU
RUNNING
LAMP SW
6T-3989
720-PU
PK-18
YL-18
BK-18
GROUND
5
3
2
794-YL
202-BK
202-BK
GY-18
WH-18
SPEED
+ BATTERY
7
200-BK
D985-BR
D986-PK
415-GN
Q
M
200-BK
462-YL
ENG OVRSPD
WARNING LAMP
107-1983
D986-PK
123-WH
727-GN
D985-BR
200-BK
308-YL
462-YL
123-WH
14
13
12
11
SHIFT
LEVER SW
9W-0681
711-BR-18
712-WH-18
713-OR-18
714-YL-18
715-GN-18
716-BU-18
202-BK-18
470-PU-18
3
4
5
8
9
1
2
10
7
6
LEVER 1
LEVER 2
LEVER 3
LEVER 4
LEVER 5
GND VERIFY
GROUND
NEUTRAL
711-BR
712-WH
713-OR
714-YL
715-GN
716-BU
202-BK
450-YL
121-YL
321-BR
321-BR
1
2
3
4
5
6
9
7
10
8
SUPP
STEER SW
6T-3990
450-YL
1
2
3
4
17
H
441-OR
16
4
5
12
14
446-PU
5
6
Q
7
8
19
18
02
15
611-PU
A G
8
6
4
7
1
9
2
3
105-BR
1
10
13
200-BK
2
200-BK
539-BU
201-BK
539-BU
411-PK
201-BK
200-BK
611-PU
411-PK
123-WH
308-YL
454-GN
611-PU
200-BK
326-PU
540-WH
20
454-GN
11
307-OR
LEFT TURN
LAMP
107-1983
3
TEST
727-GN
123-WH
L19
540-WH
A G
892-BR
Q
893-GN
202-BK
A
L
START/CHARGE
DIAGNOSTIC CONNECTOR
9
4
7
3
5
2
462-YL
200-BK
310-PU
415-GN
411-PK
410-WH
405-GY
113-OR
201-BK
201-BK
126-PK
408-WH
419-YL
412-BU
426-BR
407-PK
409-OR
J
ACTION
ALARM
9G-9813
308-YL
00
307-OR
P
H
G
LL
L
454-GN
411-PK
EPTCII
SERVICE
SET SW
9D-3721
F
EPTCII
SERVICE
CLEAR SW
9D-3721
201-BK
540-WH
539-BU
M
200-BK
103-YL-14
602-WH
DOME
LAMP
8C-9678
3
202-BK
C
QQQ
Q
Q
Q
202-BK
GN
GN
Q
L36
GY
GN
PU
200-BK
L5
L5
L17
L17
113-OR
200-BK
733-BR
E
D997-YL
126-PK
D
202-BK
202-BK
202-BK
D983-PK
126-PK
200-BK
454-GN
720-PU
202-BK
FOR A SINGLE SHEET VERSION OF THIS SCHEMATIC
CONTACT DESIGN CONTROL.
01
202-BK
D996-PU
B
710-GN
202-BK
BK-18
WW
WW
02
BK-18
BK-18
P
5
604-OR
BU
706-BR
BK-18
L
772-BR
767-WH
L
200-BK
321-BR
200-BK
200-BK
419-YL
472-OR
A
L
707-PU
202-BK
321-BR
121-YL
202-BK
707-PU
126-PK
D983-PK
711-BR
712-WH
713-OR
714-YL
715-GN
716-BU
706-BR
720-PU
126-PK
707-PU
202-BK
218-BK
219-BK
703-BU
704-GY
705-PK
709-OR
721-BR
722-WH
723-OR
724-YL
725-GN
726-BU
227-BK
217-BK
200-BK
AUTO RETARD PRESS SW
9W-0263
454-GN
103-YL-14
G
G
123-WH
449-BU
614-PU
614-PU
BRAKE OIL
TEMP GAGE
4W-2067
2
TACHOMETER
8C-5469
COOLANT
TEMP GAGE
4W-0483
BR
6
415-GN
614-PU
918-OR
449-BU
YL
PROP SOL
TEST
ID CODE 0
ID CODE 4
ID CODE 3
RIGHT SP
LEFT SP
+ BATTERY
GROUND
RIGHT SOL
LEFT SOL
XMSN SP
11
16
20
19
18
2
17
13
12
10
8
7
6
GN-18
4
1
15
3
SPEED IN
L38
6
4
5 700-PK
767-WH
710-GN
TRACTION AID
CONTROL
3E-9224
R
202-BK
768-OR
132-PK 1
2
3
202-BK
769-BU
770-GN
775-BR
774-YL
773-GY
202-BK
212-BK
200-BK
CONNECTOR FOR
ABUSIVE SHIFT
SOLENOID
D983-PK
200-BK
200-BK
200-BK
B
200-BK
OR
202-BK
202-BK
103-YL-14
202-BK
200-BK
614-PU
6 5
9
8
D983-PK
138-GN
D
202-BK
202-BK
202-BK
PP
PP
449-BU
1
200-BK
450-YL
450-YL
200-BK
200-BK
LAMP
5D-0019
123-WH
LAMP
5D-0019
123-WH 123-WH
123-WH
446-PU
RD
441-OR
441-0R
200-BK
200-BK
200-BK
200-BK A510-OR
B770-YL
B771-BR
138-GN
200-BK
A510-OR
GN
GN
GN
L8
L8
L8
27
L5
L5
L8
892-BR
L8
GN-18
BK-18
202-BK
202-BK
918-OR
PU-18
B771-BR
102-BU-14
BK
200-BK
BK/WH-14
OR-14
YL-14
H
102-BU
FAN CLUTCH
SOLENOID
101-0329
FAN CLUTCH
TEMP SENSOR/
SOL DRIVER
101-0911
FAN CLUTCH
A/C PRESS SW
101-0912
BK-14
MM
243
H
1
H
L
VLV
MOD
+BAT
GND
OVR
TRACTN AID
OR-18 4
+12V
5 767-WH
9
GN
BRAKE
PK
BK
GN
BU
YL
OR
WH
200-BK
405-GY
123-WH
450-YL
ENGINE
OVERSPEED
MONITOR
7T-3821
WARNING
200-BK
200-BK
918-OR
772-BR772-BR
768-OR
RIGHT TURN
LAMP
107-1983
DOOR
COURTESY
LAMP SW
9D-4068
BK-18
H
YL
BR
PARKING
BRAKE SW
3E-2033
306-GN
307-OR
201-BK
H
201-BK
BRAKE
AIR SW
8T-9792
3
2
1
HIGH BEAM
INDICATOR
LAMP
110-2079
ACTION
LAMP
107-1983
H
1
A
F
G
RETARDER
BRAKE SW
3E-2035
893-GN
G
G
F
408-WH
G
G
BK-18
BK-18
G
SERVICE/RETARDER
BRAKE
TEE
SERVICE
BRAKE SW
3E-2034
6
STOP
LAMP SW
2M-9346
SERVICE
BRAKE SW
3E-2034
L30
450-YL
537-GN
41
540-WH
539-BU
605-YL
606-GY
3
2
6
5
4
1
Q
KK
Q
Q
Q
-+
8
U
Q
TT
7I-5823
GG
123-WH
F
F
F
306-GN
Q
LAMP
7N-5876
AIR PRESS
GAGE
1W-3306
200-BK
614-PU
Q
A
200-BK-14
200-BK-14
A
138-GN
4
YL
AS
3
2
6
5
OR
RD-18
WH-18
BK
107-WH-14
327-PK-14
200-BK
326-PU
306-GN
ENGINE SHUTDOWN
CONTROL
9G-9287
P
+ BATTERY
GROUND
707-PU
202-BK
REFRIGERANT SW
114-5334
513-OR-14
521-YL-14
WH
PK
GROUND
7
9
1
5
2
8X-1482
3
4
OR
BK
BK
GA
E-7
E-10
D-2
B-13
AA
B-12
B-11
E-3
RD-00
E-3
200-BK
RD
BK
E
D
ENG SOL
A
00
BK-18
306-GN
BK-18
2A-7073
RD-18
LL
YL-18
B-10
OR-18
00
BK-18
306-GN
307-OR
126-PK
BU-18
H
H
WH-18
2A-6781
BULB
7N-9943
CIRCUIT GROUPING
DESIGNATION
F-14
#L
ATCH WIRE, CABLE,
COMPONENT
CIRCUIT NOT CONNECTED
CIRCUIT CONNECTED
BLUE
GREEN
BU
GN
RD
WH
892-BR
405-GY
707-PU
126-PK
LL
LL
LL
LL
L
L
L48
L48
L48
202-BK
BK-18
BK-18
767-WH
767-WH
BU
202-BK
E
TURN SW
9G-5589
200-BK
200-BK-14
200-BK
200-BK
OR
EPTC-II TRANSMISSION
CONTROL
3E-5390
YL
202-BK
PK
BK
BLADE, SPADE, RING,
OR SCREW TERMINAL
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
508-PU
509-WH
TO
ENTERTAINMENT
RADIO
L35
ANTENNA
9W-3072
200-BK-14
START AID
SOLENOID
7N-7259
COOLANT
SENDER
6N-5926
COOLANT SW
7N-9785
FUEL SW
9W-3187
L10
201-BK
200-BK-14
327-PK-14
YY
RESET
437-BR
537-GN
403-GN
310-PU
16
11
5
19
18
17
15
14
6
3
413-BR
7
13
20
9
4
8
10
2
1
12
EPTCII
DIAGNOSTIC CONNECTOR
311-WH
203-BK
207-BK
308-YL
441-OR
201-BK
105-BR
109-OR
112-PU
101-RD
314-PU
307-OR
304-WH
302-OR
313-GY
409-OR
327-PK-14
409-OR
306-GN
891-BU
L31
202-BK
720-PU
202-BK
202-BK
F
F
F
F
F
F
408-WH
892-BR
406-PU
201-BK
202-BK
201-BK
202-BK
ATCH
OPERATOR STATION
SUPP
STEERING
LAMP
107-1983
G
G
G
Q
10
ELECTRICAL CONNECTION
TO VEHICLE STRUCTURE
ATCH
ATCH
ATCH
BU
PU
710-GN
4
3
707-PU
202-BK
L
2
TT
M
2
1
BK
RD
201-BK
410-WH
GY-18
GN-18
GN-18
WH-18
PK-18
BK-18
PU-18
BU-18
YL-18
OR-18
BR-18
OPR PANEL
KEY SW
STER SW
STER SW
GROUND
+ BATTERY
ALTERNATOR
MAG SW
2
1
9
8
7
6
5
4
3
2
1
P
P
SUPPLEMENTAL
STEERING CONT
3E-5184
OPERATOR STATION
OFF (KEY)
308-YL
728-BU
200-BK
403-GN
727-GN
417-GY
403-GN
412-BU
201-BK
BK-18
BK-18
OPERATOR STATION
515-GY-14
327-PK-14
EE
209-BK-14
CC
HH
GG
200-BK-14
B-15
S
1
BACKUP
ALARM SW
9G-7204
B-10
446-PU
893-GN
S
L39
RR
MAIN POWER
RELAY
3T-0376
105-BR
KEY
START SW
9G-7641
326-PU
202-BK
Q
101-RD-6
202-BK
L47
ST
103-YL-14
+BATTERY
112-PU-12
00
RD-18
BK-18
B-10
S
200-BK
308-YL
S
200-BK
406-PU
6
L28
112-PU
S
893-GN
D997-YL
307-OR
D996-PU
CONNECTOR
101-RD
112-PU-14
SERVICE
112-PU-14
S
CLEAR
RD-00
604-OR
109-OR-6
04
891-BU
202-BK
36
537-GN
209-BK-14
606-GY
112-PU-12
107-WH-14
139-OR
15A
10A
15A
10A
DOME & STOP
LAMP
BREAKER
6N-8589
KEY
BREAKER
9G-9487
ENGINE
SHUTDOWN/FS
BREAKER
6N-8589
112-PU-12
ALT BREAKER
9S-4693
122-BU
126-PK
132-PK
138-GN
113-OR
123-WH
AIR DRYER
XMSN CONTROL
TRACTION AID
PAY MON
OPER MON
GAGES
101-RD-10
BACKUP ALARM
ABUS SHIFT
10A
10A
10A
112-PU-12
112-PU-12
112-PU-12
10A
10A
10A
112-PU-12
112-PU-12
112-PU-12
105-BR
105-BR
103-YL-14
101-RD-10
101-RD-10
ALT
136-GN
R
80A
BK-18
605-YL
BK-18
136-GN
124-GN-14
102-BU-14
132-PK
107-WH-14
122-BU
121-YL
112-PU-12
+
539-BU
YL-18
441-OR
126-PK
540-WH
15A
AIR CONDITIONER
BREAKER
6N-8589
FUSES
3K-8782
FUSE HOLDERS
4K-5122
202-BK
102-BU-14
124-GN-14
101-RD-6
101-RD-10
10A
CAT DATA LINK -
FRONT GR 5
105-BR
FRONT GR 4
FRONT GR 3
109-OR-6
FRONT GR 2
101-RD-10
FRONT GR 1
CAT DATA LINK +
WH-18
HEAD LAMP
BREAKER
3T-2662
105-BR
105-BR
RD
BK
LEVER 5
774-YL
775-BR
LEVER 4
LEVER 3
LEVER 2
LEVER 1
ID CODE 3
ID CODE 2
ID CODE 1
ID CODE 0
EEC
OUTLET
CONNECTOR
9R-7941
7
GND VERIFY
GND VERIFY
LKUP SOL
GROUND
773-GY
BED RAISE
UP SOL
DOWN SOL
RETARDER
+ BATTERY
109-OR-6
5
H
A
13
19
16
21
25
7
18
15
6
17
4
3
2
14
12
10
11
8
23
20
9
24
1
203-BK
727-GN
306-GN
462-YL
200-BK-8
101-RD-6
310-PU
450-YL
L
VV
6
5
4
3
+V
419-YL
2
1
BRAKE
SECONDARY
BRAKE SW
3E-2033
GEAR 1
VV
209-BK-14
OR-18
GEAR 2
4
GEAR 3
614-PU
606-GY
605-YL
2
604-OR
6
1
GEAR 4
7
VV
5
A
GEAR 5
37
J
321-BR
437-BR
RESISTOR
9G-1950
11
12
4
18
2
6
20
16
1
15
9
19
8
7
5
10
17
3
13
462-YL
A
207-BK
122-BU
202-BK
101-RD-6
202-BK
35
34
33
32
31
28
29
30
R
26
25
24
23
22
21
11
20
19
18
17
16
15
14
13
12
9
8
1
G
G
L43
4
6
3
2
G
G
G
L20
L23
G
G
G
G
G
G
L16
L43
614-PU
614-PU
Q
Q
Q
Q
A
GN-18
YL-18
L46
N
N
H
STOP IN
L34
L39
12
BU-18
3
202-BK
202-BK
202-BK
202-BK
176-OR
32
PK-18
202-BK
C
6
5
472-OR
101-2991
Y
L
231-BK
709-OR
710-GN
721-BR
722-WH
723-OR
724-YL
725-GN
726-BU
705-PK
704-GY
703-BU
709-OR
710-GN
721-BR
722-WH
723-OR
724-YL
725-GN
726-BU
705-PK
704-GY
703-BU
227-BK
217-BK
218-BK
219-BK
202-BK
202-BK
12
9
8
7
17
13
14
15
6
5
4
3
2
1
10
19
20
16
18
11
3
D-900ZZ
B
GROUND
SIGNAL
+V
C
B
A
CONTROL GP
6V-5828
721-BR-18
722-WH-18
723-OR-18
724-YL-18
725-GN-18
726-BU-18
231-BK-18
GROUND
GND VERIFY
GEAR 5
GEAR 4
GEAR 3
GEAR 2
GEAR 1
10
9
8
7
6
5
4
3
2
1
UP SHIFT
SOLENOID
7X-1120
LOCKUP
SOLENOID
7X-1120
DOWN SHIFT
SOLENOID
7X-1120
2
2
2
1
1
1
Z Z Y
Y
Y
YY
XMSN
SPEED
SENDER
3E-6955
705-PK
704-GY
202-BK
202-BK
202-BK
703-BU
J
H
A
B
C
D
E
I
F
G 231-BK
709-OR
710-GN
705-PK
704-GY
703-BU
721-BR
722-WH
723-OR
724-YL
725-GN
726-BU
202-BK
X
V
V
4
1
2
3
WHEEL SPEED
SENDER
3T-2469
WHEEL SPEED
SENDER
3T-2469
X
X
PARK/TURN
LAMP
3E-7741
4
3
7
2
XMSN SPEED
10
SYMBOL
ID CODE 4
A
PARK/TURN
LAMP
3E-7741
L17
WH
GN
PU
STOP/TAIL
LAMP MODULE
7X-1670
E
4 WAY
SOLENOID
9G-9988
769-BU
202-BK
767-WH
202-BK
767-WH
770-GN
L18
L43
L2
202-BK
9G-0200
774-YL
775-BR
202-BK
202-BK
202-BK
773-GY
202-BK
202-BK
202-BK
306-GN
215-BK
200-BK
200-BK
215-BK
L14
1
2
1
6
4
3
5
E J
605-YL
614-PU
200-BK-14
VV
321-BR
604-OR
606-GY
132-PK
BACK-UP
ALARM
3T-1815
BACK-UP
LAMP
9X-1439
STOP/
TAIL
LAMP
108-1289
TURN
LAMP
108-2315
321-BR
640-GN
606-GY
321-BR
639-WH
605-YL
J
768-OR
6
446-PU
1
OPERATOR MONITOR
RD-00
426-BR
123-WH
207-BK
H
CONVERTER SW
7N-7854
426-BR
T
201-BK
XMSN OIL SW
9G-3341
XMSN
FILTER SW
3E-7868
BRAKE OIL
SENDER
8N-3844
201-BK
H
T
481-GN
T
707-PU
202-BK
202-BK
202-BK
L12
AA
T
T
L12
101-RD-10
481-GN
L19
L19
ON
202-BK
U
109-4196
710-GN
413-BR
767-WH
03
767-WH
202-BK
767-WH
202-BK
231-BK
201-BK
311-WH
311-WH
311-WH
314-PU
313-GY
307-OR
ATCH
KEY
200-BK-14
310-PU
310-PU
200-BK
450-YL
614-PU
123-WH
450-YL
123-WH
123-WH
L43
307-OR
L25
727-GN
138-GN
OFF
522-WH-14
B
513-0R-14
R
327-PK-14
111-0713
109-OR-6
138-GN
200-BK
308-YL308-YL
200-BK
THIS SCHEMATIC IS FOR THE 772B/773B (8C-4577 CHG02)
AND THE 775B (3E-8545 CHG01) TRUCKS.
200-BK
426-BR 426-BR
200-BK-14
308-YL
326-PU
307-OR
727-GN
200-BK
200-BK
200-BK
124-GN-14
410-WH
411-PK
201-BK
102-BU
123-WH
123-WH
103-YL-14
540-WH
539-BU 539-BU
540-WH
103-YL-14
201-BK
614-PU
614-PU
614-PU
U
HI BEAM
HEAD LAMP
9X-7170
LOW BEAM
HEAD LAMP
9X-7169
DESCRIPTION
200-BK
109-4159
7T-3418
112-2921
112-2920
540-WH
5
614-PU
7
619-GN-14
3
611-PU-14
2
539-BU
1
U
BK-18
200-BK-14
200-BK-14
918-OR
H
BK-18
T
200-BK
200-BK-14
WH-18
RD-18
WH-18
RD-18
LOW BEAM
HEAD LAMP
9X-7169
HI BEAM
HEAD LAMP
9X-7170
540-WH
614-PU
611-PU-14
619-GN-14
539-BU
614-PU
539-BU
614-PU
611-PU-14
619-GN-14
611-PU-14
619-GN-14
OIL PRESS
200-BK
BROWN
301-BU
PURPLE
GRAY
BLACK
COLORABBREV
PINK
YELLOW
ORANGE
WHITE
RED
BR
139-OR
200-BK
PU
GY
B770-YL
200-BK-14
NOTE
H
OR-18
B
C
109-OR-10
FRAME
GROUND
918-OR
614-PU
103-YL-14
103-YL-14
201-BK 201-BK
L11
918-OR
200-BK
200-BK
200-BK
449-BU
614-PU
614-PU
200-BK
200-BK
123-WH
200-BK
200-BK
200-BK
200-BK
619-GN-14
5
4
COOLANT
FLOW SW
9X-3040
108-4529
7I-5822
2A-6648
FF
00
00
BODY
RAISE SW
8C-5681
BK
200-BK
1
2
L23
L23
200-BK
200-BK
727-GN
101-RD-6
101-RD-6
2
PU
200-BK-14
614-PU
L14
8X-8727
L3
EE
200-BK
YY
200-BK
L45
L32
BK-6
N
200-BK
DD
109-OR-6
L42
614-PU
614-PU
614-PU
614-PU
L43
306-GN
SERVICE METER
6T-7337
STOP/
TAIL
LAMP
108-1289
614-PU
614-PU
H
TURN
LAMP
108-2315
304-WH
200-BK
200-BK
200-BK
403-GN
201-BK-14
200-BK
200-BK
ENG SPEED
200-BK
BK
200-BK
ZZ
H
H
H
307-OR
200-BK
201-BK
201-BK
201-BK
PAYLOAD NEUTRAL
405-GY
M
T
521-YL-14
522-WH-14
S
PU
201-BK
H
FF
L17
L12
307-OR
BK-000
EMS NEUTRAL
BK-00
BK-00
203-BK
203-BK
207-BK
308-YL
JJ
HH
200-BK
BK-00
YY
KK
KK
P
VV
Y
N
TO ENG
BLOCK
TO
FRAME
RETARD LAMP
107-1983
310-PU
L17
201-BK
G
201-BK
C
201-BK
3
8W-8300
L17
G
G
HH
6D-1126
GN
GN
H
2W-8662
02
L20
6G-9462
311-WH
COOLANT SW
8N-1693
P
RD
BR
GN
BU
1
200-BK
406-PU
403-GN
E-12
412-BU
200-BK
00
201-BK
405-GY
R
209-BK-14
H
H
HH
8X-7029
405-GY
441-OR
310-PU
413-BR
DD
BK-18
201-BK
BK-18
202-BK
Y
NOTE A: NORMALLY OPEN BEFORE REFIGERENT CHARGE
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAGE
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF,
AND THE XMSN SHIFTER IN NEUTRAL.
RD-18
B
B
BRAKE MASTER
CYLINDER
OVERSTROKE SW
7V-5647
472-OR
419-YL
G
BK
BK
311-WH
BB
311-WH
200-BK
8
14
767-WH
200-BK-14
15A
105-BR
113-OR
START RELAY
NOTE B: LOCATIONS C-7 AND B-12. THIS SCHEMATIC SHOWS
HARNESS RR (109-4053) FOR THE 772B AND 773B. HARNESS
SYMBOL FOR HARNESS RR (111-0718) ON THE 775B IS:
RR (111-0718) FOR THE 775B IS NOT SHOWN. THE SCHEMATIC
B-1200111-0718RR
B
B
SWITCH
TRANSMISSION
EPTC II HARNESS
CODE CONNECTOR
NOTE B
5
4
3
2
1
RR
202-BK
227-BK
217-BK
218-BK
219-BK
202-BK
202-BK
202-BK
202-BK
202-BK
Y
ARC HARNESS
CODE CONNECTOR
NOTE B
ALL DASHED LINES ARE ATTACHMENTS.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
GAUGE CIRCUIT.
EMS CIRCUIT.
TRACTION AND CONTROL CIRCUIT.
AUTOMATIC RETARDER CONTROL CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN CONTROL CIRCUIT.
TURN SIGNAL CIRCUIT.
START AID CIRCUIT.
TRANSMISSION CONTROL CIRCUIT.
5
4
3
2
1
RR
202-BK
202-BK
202-BK
P
T
T
P
W
CAB/FRAME GROUND
2
1
3
D985-BR
D986-PK
AUTO RETARD
OFF/ON SW
6T-3991
G
G
200-BK
200-BK
CAB GROUND
TACHOGRAPH